Convert datomic entity map into clojure map

gistfile1.clj

(defn emap-to-hash-map [e]
  (cond
      (or
        (-> e class .toString (clojure.string/split #" ") second (= "datomic.query.EntityMap"))
        (map? e)) (reduce-kv (fn [m k v] (assoc m k (emap-to-hash-map v))) {} (into {} e))
      (coll? e) (map emap-to-hash-map e)
      :else e))

Both (instance? datomic.query.EntityMap e) and (= (class e) datomic.query.EntityMap) work and are faster than splitting the class name with a regex.

Your solution also fails to consider the many cardinality situation, the element may be a set of datomic entities which you need to traverse.

I have found this function to work better:

(defn export-entity
[entity]
(clojure.walk/prewalk
(fn [x]
(if (instance? datomic.query.EntityMap x)
(into {} x)
x))
entity))